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drm/amdgpu/umsch: reinitialize write pointer in hw init

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Otherwise the old one will be used during GPU reset.
That's not expected.

Signed-off-by: Lang Yu <Lang.Yu@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Lang Yu 2024-03-25 13:24:31 +08:00 committed by Alex Deucher
parent 4b18a91faf
commit 0f1bbcc2ba
1 changed files with 2 additions and 0 deletions
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drivers/gpu/drm/amd/amdgpu/umsch_mm_v4_0.c
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@ -225,6 +225,8 @@ static int umsch_mm_v4_0_ring_start(struct amdgpu_umsch_mm *umsch)
WREG32_SOC15(VCN, 0, regVCN_UMSCH_RB_SIZE, ring->ring_size);
ring->wptr = 0;
data = RREG32_SOC15(VCN, 0, regVCN_RB_ENABLE);
data &= ~(VCN_RB_ENABLE__AUDIO_RB_EN_MASK);
WREG32_SOC15(VCN, 0, regVCN_RB_ENABLE, data);